Summary

Important issue at stake with new flora calculations: evidence that species are only strongly marked varieties. Planning large-scale survey.

Summary

High praise and detailed comments on JDH’s introductory essay to Flora Tasmaniae, which CD has now finished reading.

Disagrees on power of transoceanic migration. Advocates glacial transport of plants.

CD’s response to reviews of Origin in Saturday Review [8 (1859): 775–6] and John Lindley’s in Gardeners’ Chronicle [but see 2651].

Summary

Comments on JDH’s Flora Antarctica. CD is delighted with it.

"I can never cease marvelling at the similarity of the Antarctic floras: it is wonderful."

Questions JDH on points raised by the work: absence of alpine flora on southern islands; comparison of climate and floras of Tasmania and New Zealand.

Summary

Enthusiastic about JDH’s plan for a British Flora – "a grand idea to make a Flora a guide for knowledge already acquired & to be acquired". Gives examples of subjects.

No work exists on various biological points in plants.

Summary

High, detailed praise for introductory essay to Flora Tasmaniae [reprinted as On the flora of Australia (1859)]. CD expects it to convert botanists from doctrine of immutable creation.

Summary

Has finished Variation. May insert a chapter on man.

Still puzzled by seeds of Adenanthera.

New Zealand and Borneo flora problems continued.

Fritz Müller found six genera of dimorphic plants in one day.

Summary

Questions on JDH’s sketch comparing floras of Australia, New Zealand, and western S. America; wishes to know botanical relations between other southern islands. Botanico-geographical discussions and comments on books sent by JDH.

Summary

Now plans to come to Kew for an hour’s farewell if his stomach permits.

Congratulations on JDH’s Flora Antarctica [1847].

Summary

CD cannot swallow continental extensions. Has written to Lyell giving a lengthy criticism of the concept [see 1910] and has asked Lyell to forward the letter to JDH.

Perhaps Aristolochia and Viscum are protandrous.

Summary

Request for Floras of Pacific Islands and Greenland.

Individual variation.

Summary

More comments on "Insular floras": community of peculiar genera in the Atlantic islands descended from European plants now extinct.

Summary

Questions JDH on separation of sexes in trees in New Zealand flora.

Summary

Tabulation of varieties goes on; very important as it shows the branching of forms. Mentions his principle of divergence.

Summary

Movement of cotton plant cotyledons.

Thanks JDH for his praise of Erasmus Darwin.

Delighted that JDH is thinking about geographical distribution, wishes he would go over the New Zealand flora again.

Summary

Responds to JDH’s outline history of plant geography.

Considers Humboldt the "greatest scientific traveller who ever lived".

Discusses the origin and rapid radiation of angiosperms in Cretaceous period.

Comments on importance of work of Alphonse de Candolle, Saporta, Axel Blytt.

Summary

Wants to go over remainder of species sketch when he sees JDH.

Urges JDH to go to Scotland.

Pleased JDH works on geographical distribution of Van Diemen’s Land flora.

Summary

Answers JDH’s questions on connection of SE. England and continent,

on the effect of breaking the Isthmus of Panama,

and on Madeira flora as remnant of Tertiary flora.

Cautionary remarks for JDH on his "Insular floras" speech, designed to strengthen case of "occasional migration" theory.

Summary

Thanks for facts about New Zealand flora.

Summary

C. F. Ledebour [Flora rossica (1842–53)] particularly useful for variety tabulation. Results generally favourable.

Additions to Down House.

Last two chapters of MS took six months to write.

Summary

Criticisms and comments on JDH’s "Insular floras" in Gardeners’ Chronicle [(1867): 6].